55400012 has 12 divisors (see below), whose sum is σ = 97312320. Its totient is φ = 27596496.

The previous prime is 55400011. The next prime is 55400027. The reversal of 55400012 is 21000455.

55400012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55400012² = 6138322659200288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55400011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24668 + ... + 26819.

It is an arithmetic number, because the mean of its divisors is an integer number (8109360).

Almost surely, 2^55400012 is an apocalyptic number.

It is an amenable number.

55400012 is a deficient number, since it is larger than the sum of its proper divisors (41912308).

55400012 is a wasteful number, since it uses less digits than its factorization.

55400012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51760 (or 51758 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 55400012 is about 7443.1184324851. The cubic root of 55400012 is about 381.2149754800.

Adding to 55400012 its reverse (21000455), we get a palindrome (76400467).

The spelling of 55400012 in words is "fifty-five million, four hundred thousand, twelve".